BU4311G-TR

Overview

The BU4311G-TR is a voltage detector with an adjustable delay time, manufactured by ROHM Semiconductor. It features a typical under-voltage detection voltage of 1.1V with ±1% precision. The reset active voltage range spans from 0.7V to 7V. The output type is CMOS open drain. The circuit current is 0.40μA when Vdet=4.8V and 0.55μA otherwise. It operates within a temperature range of -40°C to +125°C and is housed in an SSOP5 package.

Feature Summary

• Adjustable reset delay timer functionality
• CMOS open drain output configuration
• Low power consumption design

Applications

• Portable equipment requiring low voltage monitoring
• Battery-powered systems needing reset signal generation
• General purpose voltage supervision circuits

Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet before procurement. Confirm supply status as the component may be marked not recommended for new designs. Ensure compatibility with existing PCB footprints and verify RoHS compliance documentation matches the requested batch.

Selection Notes

Select this component for applications requiring precise under-voltage detection with adjustable reset timing. Consider the CMOS open drain output capability for interfacing with various logic levels. Evaluate the low standby current requirements against system power budgets. Verify that the operating temperature range meets environmental conditions.

Part Context

This part belongs to the BU43xx series of voltage detectors from ROHM Semiconductor. These components are designed for supervisory functions in electronic systems. The BU4311G specifically offers adjustable delay times, distinguishing it from fixed-delay variants. It is part of a broader family of low-voltage detection ICs.

Replacement Considerations

The BD5211G-1 is listed as a similar level replacement with the same pinout and package. Verify functional equivalence and electrical parameters before substitution.